jebinc
Well-Known Member
No, that's not how it works. Engineering design expects failures will happen, warranty claims will happen. To design with an expectation of zero failures is not only not particularly realistic, it also ignores costs so unless you and your customers have an unlimited budget that is just bad engineering.
As an engineer, I think you are both right. No design will be based on a "zero failure" requirement, however there is a factor of safety "factor," based one desired longevity/design life. It might be 1.2, 1.5, or whatever Telsa's reliability targets/goals are.